From: Carnevale, Jason (jcarnevale@xxxxxxxxxxx)
Date: Fri Nov 16 2001 - 04:23:59 GMT-3
Not really sure what you are asking but if I am reading this right you are
asking if you need to add a network statement or redistribution statement
for the loopback under each bgp process in each router in each AS to be able
to ping the loopback interface in AS1. If this is the question then the
answer is no, so long as the network statement is on the router in AS1 and
each bgp session between the routers in AS1,2,3,and 4 are EBGP. If you post
the configs on each router it may be more clear what the problem is.
Jason
-----Original Message-----
From: Thekkethala [mailto:thek@mediaone.net]
Sent: Friday, November 16, 2001 1:49 AM
To: ccielab@groupstudy.com
Subject: A very basic question : BGP
Just a sudden 'shake-up' in my fundamentals all of a sudden
Here is the clarification. (EBGP links - do they need to be leaked ???)
1. You have multiple AS's and have EBGP running between them all.
as1 ------->as2----->as3------->as4 (a single router in each AS for example)
lets say yu configure a loopback address in as1 and leak it into bgp via a
network statement in as1.
Now, keeping the config (basic) as is, yu sit on the router on as4 and try a
ping back to as1 to this interface. It does no go thru. However all the BGP
tables enroute indicate this entry and since they are directly connected
ebgp
setups, the next hop are there in the ip routing table as well (directly
connected).I then did a redistribute-connected under the bgp process on ALL
the routers and tried again - no luck in reaching the loopback address in
as1
FROM as4 - however from as2 no problems / as3 and as4 no go at all !!
My Question>
1. The eBGP links between routers :
Do we ALWAYS need to consciously redistribute them in BGP setup
(using either the redistribute-connected or network statement along with a
no
auto-summary) to enable a ping / traceroute etc .. for ip basically
...........
I am sorry if this sounds really elementary ... but am quite puzzled - what
if
I have a setup involving 50/60 ebgp session (in theory I mean) ....!!!!!
This archive was generated by hypermail 2.1.4 : Fri Jun 21 2002 - 06:45:16 GMT-3